new research discussed in san francisco. researchers found higher rates of cardiac problems for people who lived in new orleans six years after hurricane katrina. another study looked at 200,000 veterans. those with post-traumatic stress disorder were more likely to develop increases in blood pressure and cholesterol. >>> silicon valley is rebounding but not good news for everyone. according to the annual silicon valley index, silicon valley had the highest job growth in a decade. at the same time, food stamp participation hit a ten-year high. and homelessness rose 20% in just two years. the study says it's hard to make ends meet with the high cost of living in the bay area. median home price, $550,000. rents averaged $2,000 a month for a two-bedroom apartment. for a family of four, you need $90,000 a year just to cover rent, food, child care, and transportation needs. >>> hundreds of high schoolgirls picked out their prom dresses for free today. san jose high school students had the chance to choose from more than 2,000 don